<template>
  <div class="app-container">
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" min="0"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>
      <!-- 讲师头像：TODO -->
      <el-form-item label="讲师头像">
        <!-- 头衔缩略图 -->
        <pan-thumb :image="teacher.avatar"/>
        <!-- 文件上传按钮 -->
        <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像</el-button>
        <!--
      v-show：是否显示上传组件
      :key：类似于id，如果一个页面多个图片上传控件，可以做区分
      :url：后台上传的url地址
      @close：关闭上传组件
      @crop-upload-success：上传成功后的回调
        <input type="file" name="file"/>
        -->
        <image-cropper
          v-show="imagecropperShow"
          :width="300"
          :height="300"
          :key="imagecropperKey"
          :url="BASE_API+'/edu/oss/file'"
          field="file"
          @close="close"
          @crop-upload-success="cropSuccess"
        />
      </el-form-item>
      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate()">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>
<script>
  import teacherApi from '@/api/edu/teacher'
  import ImageCropper from '@/components/ImageCropper'
  import PanThumb from '@/components/PanThumb'

  export default {
    components: {ImageCropper, PanThumb},
    data() {
      return {
        teacher: {},
        // 上传弹框组件是否显示，false：不显示；true：显示。
        imagecropperShow: false,
        BASE_API: process.env.BASE_API, // 获取dev.env.js里面的地址
        saveBtnDisabled: false // 保存按钮是否禁用
      }
    },
    watch: {
      // 监听
      $route(to, from) {
        // 路有变化方式，路由发生变化，方法就会执行
        this.init()
      }
    },
    created() {
      this.init()
    },
    methods: {
      close() { // 关闭上传弹框的方法
        this.imagecropperShow = false
        // 上传组件初始化
        this.imagecropperKey = this.imagecropperKey + 1
      },
      // 上传成功方法
      cropSuccess(data) {
        this.imagecropperShow = false
        // 上传之后接口返回图片地址
        this.teacher.avatar = data.url
        this.imagecropperKey = this.imagecropperKey + 1
      },
      init() {
        if (this.$route.params && this.$route.params.id) {
          const id = this.$route.params.id
          this.getInfo(id)
        } else {
          // 清空表单
          this.teacher = {}
        }
      },
      // 根据讲师id查询讲师
      getInfo(id) {
        teacherApi.getTeacherInfo(id).then(response => {
          this.teacher = response.data.teacher
        })
      },
      saveOrUpdate() {
        if (!this.teacher.id) {
          this.saveTeacher()
        } else {
          this.updateTeacherInfo()
        }
      },
      // 修改讲师的方法
      updateTeacherInfo() {
        teacherApi.updateTeacher(this.teacher).then(response => {
          this.$message({
            type: 'success',
            message: '修改成功!'
          })
          // 回到列表页面，路由跳转
          this.$router.push({path: '/teacher/teacherList'})
        })
      },
      // 添加讲师的方法
      saveTeacher() {
        teacherApi.addTeacher(this.teacher).then(response => {
          this.$message({
            type: 'success',
            message: '添加成功!'
          })
          // 回到列表页面，路由跳转
          this.$router.push({path: '/teacher/teacherList'})
        })
      }
    }
  }
</script>
